Individual-tree Diameter Growth Model for Platycladus orientalis Plantation in Beijing Area

Abstract

Abstract: Growth model was widely used for researching growth habit of trees and forest management.4 continous forest inventories, data of Platycladus orientalis plantation in Beijing area were used for this study.The data collected from a total of 26 fixed-plots and 1172 individual trees were used for modeling 3 types of tree diameter growth.The model independent variables contained tree growth factors,site factors and competition factors.Effect of multi-collinearity among in the independent variables were also considered and those independent variables which had serious multi-collinearity relationship problem were rejected.The 3 types of models passed the test of variance analysis,homogeneity test of variances and residual normality test.Test of model predictive effect was used for the validation database and the result indicated that the observed values and the predicting values have no significant difference.All types of individual tree models can predict the diameter growth of Platycladus orientalis plantation accurately.

Key words: Beijing area, Platycladus orientalis plantation, diameter growth model, multi-collinearity, correlation analysis, forest inventory

CLC Number:

S711
S758.5

DUAN Jie, MA Luyi, XUE Kang, WANG Jinzeng, DING Xiangyang, ZHANG Bo. Individual-tree Diameter Growth Model for Platycladus orientalis Plantation in Beijing Area[J]. FOREST RESOURCES WANAGEMENT, 2010, (2): 62-68.

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